2 literature references for Indigofera ionii Jarvie & C.H.Stirt.:

Author: Schrire,B.D.
Year: 1991
Title:
Source: Systematic..African Indigofereae PhdThesis.Uni.of Natal,S.A.
Author: Jarvie,J.K. & Stirton,C.H.
Year: 1987
Title:
Source: Bothalia 17:1-6. The Indigofera filifolia complex in s.Afr.